Ohio State University Wexner Medical Center widened its operating margin and reported boosts in both inpatient and outpatient visits in the final full year before completing its $1.1 billion expansion.

The two-hospital system reported operating income of $219 million on $2.16 billion in revenue in the year ended June 30, increasing its operating margin by half a percentage point over the prior year to 10.3 percent.

With expenses from opening a new hospital building halfway through fiscal 2015, this year’s budget calls for a slightly more modest gain of $184 million on $2.3 billion in revenue, according to a presentation Thursday to medical center board members. The James Cancer Hospital accounts for 88 percent of that gain.

Ohio’s expansion of Medicaid eligibility is expected to help finances by reducing charity care and unpaid bills from low-income patients, according to the presentation. However, it says, patients buying private insurance on the federal Health Insurance Marketplace under the Affordable Care Act present a payment risk because many of those plans have high deductibles they may not be able to meet.

The $750 million, 21-story critical care and cancer tower that is the centerpiece of the expansion is set to open in December. University Hospital and the James will grow to a combined 1,367 beds as 348 private rooms open in the tower but 160 beds are taken offline for renovation in the original James building.

In an era of declining hospital admissions nationwide, the added capacity is expected to lead to 2 percent increase in inpatient visits for the coming year. Inpatient visits grew by 1 percent from fiscal 2013 to 2014.

OSU trustees are set to vote Friday on a $4.6 billion university-wide budget, half of which is the health system, for the year ending next June.